body{
  position: relative;
  background-color: #fff;
}
.logo{
  width: 100%;
  height: 200px;
}
.logo>img{
  width: 80px;
  height: 80px;
}
.rt{
  width: 96%;
  height: 40px;
  margin-left: 2%;
  outline: none;
  border: none;
  border-bottom: 2px solid #f7f7f7;
}
.cc{
  width: 20%;
  height: 35px;
  right: 2%;
  top: 2px;
  border: none;
  outline: none;
  background-color: #fff;
}
.yz{
  top: 55px;
}
.dl{
  width: 94%;
  height: 35px;
  top: 110px;
  margin-left: 3%;
  background-color: #ff5e16;
  border: none;
  outline: none;
}

.nav{
  width: 100%;
  height: 50px;
  background-color: silver;
  justify-content: space-around;
  align-items: center;
  position: fixed;
  bottom: 0;
  z-index: 2;
}
.nav>div>i{
  font-size: 23px;
}
.nav>a>i{
  font-size: 23px;
}
.nav>div>p{
font-size: 10px;
}
.nav>a>p{
  font-size: 10px;
  }
.four{
  color: #ff9b6e;
}